Robert Whitehead at the Melbourne Magistrates Court. Photo: Luis Ascui

This number is set to grow, with detectives understood to be soon taking a statement from another person who claims to have been abused by Mr Whitehead.

A wheelchair-bound Mr Whitehead faced the Melbourne Magistrates Court this morning where his bail was extended. He faces a committal hearing on April 17.

Fairfax Media is unable to report important details of Mr Whitehead's employment history and alleged offending due to legal reasons.

However, if he is found guilty, his case will raise questions for Victoria's transport department and several historic railway society's that he was associated with, including the iconic Puffing Billy service.

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Mr Whitehead was head controller at Melbourne's Spencer Street station and most recently associated with the Seymour Historic Rail Society.

His expertise has been used by the Victorian government and several councils to promote the state's historic railway lines.

He has been charged with 31 counts of indecent assault of a person under 16, two counts of sexual penetration of a minor aged between 10-16 and one count of false imprisonment.